US lawIllinoisRegulationsTitle 35 — ENVIRONMENTAL PROTECTIONCHAPTER I: POLLUTION CONTROL BOARDSUBCHAPTER a: PERMITS AND GENERAL PROVISIONSPart 203 — MAJOR STATIONARY SOURCES CONSTRUCTION AND MODIFICATIONSubpart A203.12735 Ill. Adm. Code 203.127Nonattainment AreaLast amended: 1988Year: 2026Length: 29 wordsOfficial source Section 203 Section 203.127 Nonattainment Area An area designated by USEPA as nonattainment for a given pollutant pursuant to Section 107 of the Clean Air Act (42 U.S.C. 7407).Previous35 Ill. Adm. Code 203.126Next35 Ill. Adm. Code 203.128